

I can find noreliable source showing a Maud or Matilda de Longespee either married to Hugh or not (Terry Jackson Curator 5 Feb 2012) and none either showing her as a daughter of William "Clito" & Giovanna.
The following from Medlands suggests that it is impossible that Matilda / Maud de Longespey was married to Hugh de Mortimer:
http://fmg.ac/Projects/MedLands/ENGLISH%20NOBILITY%20MEDIEVAL2.htm
Hugh de Mortimer m ([1150]) as her second husband, MATILDA de Rumilly, widow of PHILIP de Belmeis, daughter of WILLIAM FitzRanulf Meschin, of Skipton-in-Craven & his wife Cecily de Rumilly (-after 1189[239]). The Complete Peerage explains the the documents which confirm her parentage and second marriage[240]: including (1) pleadings in a suit concerning land at Kimbolton, Hampshire, and in a suit dated Jan 1282 in the Chester County Court, which both name Roger de Mortimer as son and heir of "Maud la Meschine"[241]; (2) Roger Mortimer´s grant of rents in Bisley given to him by "his brothers Philip and Ranulph de Belmeis"[242]; (3) “Philippus de Belmeis” founding Lilleshall Abbey, Shropshire by undated charter, witnessed by “Philippus filius Philippi de Belmis…domina Matilda filia Willielmi Meschin uxor prædicti Philippi de Belmis…”[243]. A manuscript narrating the foundation of Wigmore Abbey records that she was “Matildem Longespey, filiam Willielmi Longespey, ducis Normanniæ”[244] but this is confused and cannot possibly be correct. The undated charter, under which "Hugo de Mortuo mari" confirmed various donations to Saint-Victor-en-Caux and other past donations including all donations of property in England "antequam duxissem uxorem"[245], indicates that Hugh married only once.
Hugh & his wife had four children
1273 |
1273
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Richards Castle, Herefordshire, England
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1273
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Of, Richard's Castle, Herefordshire, England
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1291 |
November 24, 1291
Age 18
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Richards Castle, Herefordshire, England
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1295 |
September 14, 1295
Age 22
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Richards Castle, Herefordshire, England
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1300 |
1300
Age 27
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Cheilmershe, Shropshire, England
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1308 |
February 16, 1308
Age 35
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England
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1991 |
September 19, 1991
Age 35
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1992 |
January 31, 1992
Age 35
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